Mechanical movement



(No Model.)

M. W. POSTER. MECHANICAL MQVEMENT.

110.414,512. v l Patented Novn 5, 1889.

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UNITED STATES PATENT OFFICE.

MARK YV. FOSTER, OF PECATONICA, ILLINOIS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 414,512, dated November 5, 1889. Application led February 23, 1889. Serial No. 300,883. (No model.)

To all whom t may concern:

Be it known that I, MARK WV. FOSTER, a citizen of the United States, residing at Pecatonioa, in the county ot Winnebago and State of Illinois, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

The object of this invention is to obtain movement by means of aframe of trapezoidal form, within which is placed a cam which engages the sides of the frame, thereby imparting to the frame an alternate back-and-forth movement in any plane required.

In the accompanying drawings, Figure lis a face View of my improved movement. Fig. 2 is a lengthwise central section of the same. Fig. 3 is a transverse section of the frame on dotted line X X, showing the roller.

The movement represented in the accompan ying drawings consists of a base-plate l, upon which is mounted a frame of trapezoidal form, consisting of the side pieces 2 and 8 and end pieces 4 and 5 secured together. An arm 6 projects from the end pieces 4 for a purpose to appear hereinafter. This frame is pivoted to the base-frame l by a pivot-bolt 7 passing through the end piece 5 into the This frame by means of its pivot-connection with the base-frame has an alternate back-and-forth oscillating movement.

Nithin the openin g of the trapezoidal f rame is located a cam 8 of a size nearly equal to the least diameters of the opening. The cam is pivoted at 9 to the base-frame and has a series of perforations, by means of which the leverage may be changed. An operating-lever l0 extends from the cam outside of the frame and by means of which the cam is oscillated on its pivot. This leveris bent so as to bring the handle portion on the same plane as the cam, thereby preventing all tendency of the cam to sidewise movement. The base-plate 1 is provided with a series of holes 1l for the purpose of adjustment of the cam to increase or diminish the movement of the frame. On the inside of the side pieces 2 and 3 are secured brackets l2. Between these bracketsy are held rollers I3, having a pivotfconnection therewith. A series of perfor-ations 14 are for the purpose of adjusting the brackets, as the cam is adjustable in the lengthwise direction of the frame. The object of the rollers is to decrease the friction of the cam against the side pieces of the frame. The projecting end 6 may be of any desired length, and the machine or device to be operated has a connection therewith.

In operating my improvement the operator will impart motion to the cam by means of the lever. In the movements of the cam it will engage the rollers on the side piece of the frame, thereby causing the frame to oscillate on its pivot-connection with the baseframe. A back-andforth movement imparted to the cam will impart a like movement to the frame, and the movement of the arm 6 will be greatly increased. By means of the various adjustments the movement of the parts will be increased or diminished as required.I

I claim as my inventionl. A mechanical movement consisting of a base-plate, a trapezoidal frame, a cam within the frame, and a lever for imparting motion to the cam and frame, said cam made adj listable in its connection with the base-plate, sub* stantially as set forth.

2. A mechanical movement consisting of a base-plate, a trapezoidalframe, a cam within the frame, a lever for imparting motion to the cam and frame, and rollers against which the cam moves, said rollers made adjustable Y in the lengthwise direction of the frame, substantially as set forth.

MARK W'. FOSTER.

Witn esses A. O. BEHEL, E. BEHEL. 

